Willabd j



Jan. 217, 1931. j W -j LUFF 1,790,587

' TRAP Filed Feb. 2l, 1929 2 Sheets-Sheet 2 IN VEN TOR.

r C a JW Ang/mg@ advantage exists.

Patented Jan. Z7, 1931 erster.

WILLARD J. .nimmer oLEv'ELAND HEIGHTS, `oHIo TRAP , Application flied February 21, 1929. seriaiNo. 341,825.

The present invention relates, as indicated, to traps, and the primary object thereof is to provide a trap so constructed as to prevent the accumulation therewithin' of scums or deposits of soap, grease, and other types of dirt. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechaf of two further 'types of trap membersv em bodying the present invention. l

rlhe ordinary drum trap comprises a cylindrical chamber having an outlet conduit opening therein to adjacent the base of the chamber or Ydrum and extending upwardly without the drum to a point adjacent the top of the drum; and having an inlet port opening into the drum either adjacent the base thereofVA or substantially on the level of the upper end of the outlet conduit. In the for.- mer type of trap, where it is applied to a bath tub drain, for instance, a very serious'dis- After a tubful of vwater has been used and the drain for thetubis opened, water flows at a high velocityinto the drum through the inlet thereto. This high velocity liquid sweeps directly across the bottom of the drum to the outlet, scarcely rufiiing the surface of the liquid in the trap.

l .As the bath tub is drained, the on the drain is reduced, and consequently the velocity Vof the liquidflowing to the trap is reduced. Asthe last few quarts `of liquid run out of the tub, they areunderthe influence of a very low head, andconsequently their l velocity as they enter the trap 'is very low. rlhese last few quarts, furthermore, carry practically all of the solid matter. in the tub, and this solid'matter, which is lighter than the liquid, will tend to rise in the drum ofthe trap. As a consequence, after months VYor years of use, a fairly thick scum of soap, grease, and other dirt gathers upon the surface of the liquid standing in the trap. Furthermore, as the first rush of liquid enters the ,liti

drum, a pressure is'built up in the drum which compresses the air thereinl above the liquid level.- This, of course, results in the .solution of a certain amount of air in the liquid in the trap, and a reduction of the pressure withinthe trap when thev tub has been emptied. Consequently, after a long period of use, the normal liquid level in the drum is materially. raised, andy sometimes `this level is raised to such an extent that the scum on the top of the liquid comes into actual contact with the lower face of the .clean-out plug and a deposit is formed thereon.

In the latter type of trap, the liquid discharged from the tub tends to' flow practicallyin a straight'line from'the inlet opening to the point at which the outlet conduit enters the drum, and any heavy material which may be carried by the streamtends to fall as a siltv into the corner ofthe drum adj jacent the wall through which the inlet enters the drum. lt has been found that, after long periods of use, 'veryy material. deposits of silt are present in traps of this type.

In Figs. l and 2 there is illustrated a drum d the receptionof the threaded annular flange velocity through the trap.

"11i: of aclea'n-out plug 15. An inlet 16 opens into said drum adjacent the base thereof as at .17, and an outlet conduit 18 opensinto said drum adjacent the base thereof as at 19 and extends upwardly without the drum as shown, the upper free end 20 of the conduit 18 being on a level adjacent the upper end 152 ofthe drum. Because of this construction,

liquid will normally stand in the drum ll'at the le-vel indicated by the dotted line 21.

Between the points 1T and 19 the base of the drum is formed'with a baille 22, and it will be noted that said base is formed to provide a smoothly curved wall' 23 extending from the bottom of the inlet opening 1'?" to the peak 24 of the baille 22; and to provide a smoothly curved wall 25 from the peak Q4 ofthe baiile to the bottom of the port 19 throughwhich the outlet conduit 18 opens into the drum 11.

As a consequence of this construction, when the drain of substantially filled bath tub is opened, ,liquid will rush through the port 17 and will be deflected by the curved Wall and baiiie 22 substantially along the lines indicated by the arrows'in F ig. 1. Since 'this liquid is entering the trap at high velocity, it will be thrown, by the wall 23, beyond the level 21 of the liquid inthe drum, and some-y times will be caused to sweep across the inner face of the clean-out plug 15. The liquid isr ably will not bethrown above the level of the liquid in the drum, but even they will probably .cause a4 certain amount of Vroiling of vsuch surface. As will be obvious, the solid matter carried by the last few Vquarts of liquid will, even in this construction, rise to a float upon the surface of the liquid in the trap., but thismatter will be carried with .the neXt dischargeof liquid at a relatively high In' Figs'. 3 and l, there is illustrated a trap of the general class second described above. This unit comprises a casing forming a chain-- ber orV drum 81 having anopen upper end internally threaded as at for the reception of a threaded annular flange Bei of a clean-out plug 35. Ain inlet 36 opens as at 3'? into said drum, and an outletconduit 38 opens at 39 into the drum adjacent the base thereof. ri"he upper end l0 of the conduit 38 is disposed on substantially the samelevel as the inlet 8G so that the liquid level 41 inthe drum stands substantially at the bottom of the inlet opening '37.Y In Fig. 3, dotted arrows indicate generally the direction of flow of liquid in anl ordinary7 drum trap of this class, while solid line arrows indicate the direction of flow of liquid in the illustrated trap. As illustrated, liquid flowing through the trap sweeps the curved wall 42 which extends upon a smooth curve from the bottom of the inlet opening 37 to the bottom of the outlet opening 39, the liquid being directed against this wall by the baille il?) within the drum.

Referring now to the modifications illustrated Figs. 5 and 6, it will be seen that in Fig. 5, I have shown a trap member indicated generally atvlll Vand provided with an inlet hub e5, a verticallydisposed outlet hub 46, vand a. clean-outk hub i7 disposed between the inlet and outlet. l lli partition 48 separates theroutlet passage from the mainbody 19 of the trap member thereby providing for a liquid seal to stand said body 49. A baffle 50 is provided between the inlet and outlet hubs and substantially on the center line of the body portion 49. rlhe action of the baille 50 is substantially the same as that of the baffle 22m the modication illustrated in Fig. 1... j

In F ig. 6, I have illustrated a trap Amember 51 having an inlet hub 52 and any outlet conduit 53, the outer end of which is disposed at a'level above the base of the threads in the clean-out opening 54 so that the liquid seal stands normallyin the body portion 56 just below the upper end of the hub 54:, such seal being provided for by the partition 55. In this modification, again, I h ve'p'rovided a bathe 57 substantially on the center line of the body portion 56 which, as in the previously described modifications, makes the trap self-cleaning.

Other modes of applying the principle ofy my invention may be employed instead of the one explained, change being madeV as regards the mechanism herein disclosed, provided the means stated byfany ofthe following claims or the equivalent of such stated means be employed. ,l y I therefore particularly point out and distinctly claim as my invention:

' 1. In a drum-,type trap, a closure plate for the top of the drum, an inlet'opening into the drum adjacent the base thereof, an outlet conduit opening into said drum adjacent the base thereof and extending outwardlyV and upwardly to the approximate level ofthe top of said drum, whereby liquid is caused to stand in said drum at a level above said inlet opening, and a curved upwardly projecting flange in the bottom of said drum opposite said inlet opening adapted to causefmat-erial entering through said opening to sweep the inner face .of said closure plate.`

2.y A trap of the class described comprising a casing with wall portions forming a cham- J ber having a removable vclosure at its upper extremity, said chamber having an inlet opening adjacent the lower extremity ot oneiof its side wall portions, means directly associated with said inlet opening for directing Vflow upwardly along said side wall portion,

said chamber having an outlet opening adjacent the lower extremity of its side wall portion opposite said inlet opening, and an outlet passage leading from said outlet opening to an out-let connection at its outer end, said outlet passage having its top wall portion above the level of the bottom of said inlet opening, and said outlet passage having the uppermost elevation of its bottom wall portion above the lowermost elevation of its top wall portion.

3. A trap of the class described comprising a casing with wall portions forming a chamber having a removable closure at its upper v extremity, said chamber having an inlet opening adjacent the lower extremity of one of its side wall portions, means directly associated with said inlet opening for directing ow upwardly along said side wall portion, said chamber having an outlet opening adjacent the lower extremity of its side wall portion opposite said inlet opening, and an outlet passage leading from said outlet opening to an outlet connection at its outer end, said outlet passage having its top wall portion above the bottoms of said inlet opening and said outlet opening, and said outlet passage having the uppermost elevation of itsl side wall portion opposite said inlet opening,

and an outlet passage leading from said out# let opening to an outlet connection at its outer lend, said inlet passage and said outlet passage having the lowermost elevation of their top wall portions at substantially the same level, said outlet passage having its top wall portion above the bottoms of said inlet opening and said outlet opening, and said outlet pasmi ing a casing forming a chamber havingra resage having the uppermost elevation of its bottom wall portion above the lowermost elevation of its top wall portion.

5. A trap of the class described comprismovable closure at its upper extremity, an inlet opening adjacent the bottom of said chamber, means for directing flow from said inlet upwardly into said chamber toward said closure, said chamber also having an outlet opening adjacent its bottom portion, and an upwardly directed` passage from said outlet leading to an outlet connectioinsaid passage having one portion of the wall thereof above the lower level of said inlet and another portion at the point of connection above the level of said irst portion.

Signed by me this 16th daylor' February, 1929.

j WILLARD J. LUFF.

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